Kusanthula kwa inductor current| KHALANI BWINO

Mapangidwe a inductor amabweretsa zovuta zambiri kwa mainjiniya pakupanga kosinthira magetsi. Amisiri sayenera kungosankha mtengo wa inductance, komanso lingalirani zapano zomwe inductor imatha kunyamula, kukana kwamphepo, kukula kwamakina ndi zina zotero. Zotsatira zaposachedwa za DC pa inductor, zomwe zidzaperekanso chidziwitso chofunikira pakusankha koyambitsa koyenera.

Kumvetsetsa ntchito ya inductor

The inductor nthawi zambiri amamveka ngati L mu LC fyuluta dera mu linanena bungwe la kusintha magetsi magetsi (C ndi linanena bungwe capacitor). Ngakhale kumvetsetsa kumeneku kuli kolondola, ndikofunikira kumvetsetsa mozama zamakhalidwe a inductors kuti mumvetsetse kapangidwe ka ma inductors.

Pakutembenuka kwapansi, mbali imodzi ya inductor imalumikizidwa ndi magetsi a DC. Mapeto enawo amalumikizidwa ndi magetsi olowera kapena GND kudzera pakusintha pafupipafupi.

Inductor imalumikizidwa ndi magetsi olowera kudzera mu MOSFET, ndipo inductor imalumikizidwa ndi GND. Chifukwa chogwiritsa ntchito chowongolera chamtunduwu, chowongoleracho chikhoza kukhazikitsidwa m'njira ziwiri: ndi diode grounding kapena MOSFET grounding. Ngati ndi njira yomaliza, chosinthiracho chimatchedwa "synchronus" mode.

Tsopano ganiziraninso ngati zomwe zikuchitika mu inductor m'mayiko awiriwa zikusintha. Mapeto amodzi a inductor amalumikizidwa ndi magetsi olowera ndipo enawo amalumikizidwa ndi voteji yotulutsa. Kwa chosinthira chotsika, magetsi olowera ayenera kukhala apamwamba kuposa ma voliyumu atulutsa, kotero kutsika kwamagetsi kwabwino kumapangidwa pa inductor. M'malo mwake, panthawi ya 2, mbali imodzi ya inductor yomwe imagwirizanitsidwa ndi magetsi olowera imalumikizidwa pansi. Kwa chosinthira chotsika, mphamvu yotulutsa iyenera kukhala yabwino, kotero kutsika kwamagetsi koyipa kumapangidwa pa inductor.

Choncho, pamene voteji pa inductor zabwino, panopa pa inductor adzawonjezeka; pamene voteji pa inductor ndi zoipa, panopa pa inductor adzachepa.

Kutsika kwamagetsi kwa inductor kapena kutsika kwa voliyumu yakutsogolo kwa Schottky diode mumayendedwe asynchronous kumatha kunyalanyazidwa poyerekeza ndi mphamvu yolowera ndi kutulutsa.

Kuchuluka kwa inductor core

Kupyolera mu nsonga yapamwamba ya inductor yomwe yawerengedwa, tikhoza kupeza zomwe zimapangidwa pa inductor. N'zosavuta kudziwa kuti panopa kudzera mu inductor ukuwonjezeka, inductance yake imachepa. Izi zimatsimikiziridwa ndi thupi la maginito core material. Kuchepetsa kuchuluka kwa inductance ndikofunikira: ngati inductance imachepetsedwa kwambiri, chosinthira sichingagwire ntchito bwino. Pamene njira yomwe ikudutsa pa inductor ndi yaikulu kwambiri moti inductor imakhala yogwira ntchito, yamakono imatchedwa "saturation current". Ilinso ndiye gawo loyambira la inductor.

Ndipotu, kusintha mphamvu inductor mu kutembenuka dera nthawi zonse amakhala "zofewa" machulukitsidwe. Pamene panopa akuwonjezeka kumlingo wakutiwakuti, inductance si kuchepa kwambiri, amene amatchedwa "zofewa" machulukitsidwe khalidwe. Ngati panopa akuwonjezeka kachiwiri, inductor idzawonongeka. Kutsika kwa inductance kulipo mumitundu yambiri ya inductors.

Ndi mawonekedwe ofewa awa, titha kudziwa chifukwa chake ma inductance ochepera pansi pa DC yotulutsa pakali pano amatchulidwa mu otembenuza onse, ndipo kusintha kwaposachedwa sikungakhudze kwambiri inductance. M'mapulogalamu onse, mphamvu yamagetsi ikuyembekezeka kukhala yaying'ono momwe ingathere, chifukwa idzakhudza kutulutsa kwamagetsi. Ichi ndichifukwa chake anthu amakhala okhudzidwa nthawi zonse ndi inductance pansi pa zotulutsa za DC ndikunyalanyaza kulowetsedwa pansi pa ripple current mu Spec.

Zomwe zili pamwambazi ndikuyambitsa kusanthula kwaposachedwa kwa inductor, ngati mukufuna kudziwa zambiri za ma inductors, chonde omasuka kulumikizana nafe.